Me in The Guardian on the subject of unpaid overtime and the absolute increase in the rate of exploitation in Britain:

You're being exploited in more ways than you know. The TUC reports, not for the first time and surely not for the last, on a form of exploitation that rarely gets attention in the media. Workers are contributing £29bn worth of free labour to British employers every year simply by working unpaid overtime. This surplus is being squeezed out of workers through market discipline – the threat of unemployment or reduced prospects.